一种基于真随机数发生器的扩展频谱CMOS振荡器的设计  

Design of Spread Spectrum CMOS Oscillator Based on Truely Random Number Generator

作　　者：季轻舟[1] 耿增建[1] 魏海龙[1] 

机构地区：[1]西安微电子技术研究所,陕西西安710054

出　　处：《现代电子技术》2008年第23期78-80,83,共4页Modern Electronics Technique

摘　　要：采用恒流源充放电技术，以比较器为核心，利用一种新型真随机数发生器产生随机控制信号，设计一种基于0．5μmCMOS工艺的扩展频谱振荡器，振荡频率在1～1．6MHz的范围内。通过Cadencespectre仿真工具对电路进行仿真验证，结果表明，该方案能够在1～1．6MHz的范围内产生随机振荡信号。该振荡器可以用于改善DC／DC转换器的噪声性能。This paper presents a spread spectrum oscillator based on 0.5μm CMOS process, its frequency is from 1 1.6 MHz,a true random number generator of a new structure is used to generate random signal of control, comparator is regarded as a key circuit,the method of constant current source changing and dischanging is used. Simulated result using the tools of Cadence Spectre shows that the frequency is from 1 - 1.6 MHz. The spread spectrum oscillator can be applied in DC/DC converter to improve its performance of noise.

关 键 词：真随机数发生器 扩展频谱振荡器 DC/DC转换器 噪声 

分 类 号：TM13[电气工程—电工理论与新技术]